Bicycle-frame.



m. 675,3-9l. Patented June 4, I90l. 3.. m. KEATING. BICYCLE FRAME.

(Application filed Dec. 8, 1900..

(No Model.)

UNITED STATES PATENT FFICE.

ROBERT M. KEATING, 0F MIDDLETOWN, CONNECTICUT, ASSIGNOR TO B. M. KEATINGMOTOR COMPANY, OF PORTLAND, MAINE.

BlCYCLE-FRAM E.

SPECIFICATION forming part of Letters Patent No. 675,391, dated June 4,1901.

Application filed December 8, 1900. Serial No. 39,177. (No model.)

To all whom it may concern.-

Be it known that 1, ROBERT M. KEATING, residing at Middletown, in theState of Connecticut, have invented certain new anduseful Improvementsin Bicycle=Frames,of which the following is a specification, referencebeing had therein to the accompanying drawings.

This invention relates to bicycle-frames.

The object of the invention is to produce a frame for motor-bicycleswhich shall have the simplicity and strength of the well-known diamondframe and the capacity for compactly storing and retaining the engine inplace, together with supports for the usual pedal-motor.

Figure 1 is a side elevation of the frame, engine casing, and reductiongear casing. Fig. 2 is a bottom plan of the same. Fig. 3 is a brokenperspective of pedal-shaft hanger, showing its relation to the frame andenginecoupling. Fig. 4 is a perspective of enginecasing with gear-casingbroken away. Fig. 5 is a perspective of bar-coupling.

The frame in the main consists of the front post 1, front top bar 2,front bottom bar 3, seat-post 4, and the rear top bars 5, arranged intheir usual relation.

The rear lower bars 6 are shorter than usual, and While connecting withthe wheel-forks 7 in usual manner are joined by a cross-bar 8 in rear ofthe seat-post 4.

The cross-bar 8 is in form of a U, having upper and lower and uprightleaf. These leaves embrace a rectangular projection 9 on the enginecasing 10. Bolts having their heads inside the casing project throughholes 11, so that the rear bars can be held to the casing by tighteningthese nuts.

The pedal bracket or shaft hanger 14 has levers 15 and 16 projecting inthe rear of the seat-post and an upright leaf 17, which is perforatedfor the passage of bolts 29, which extend through holes 19 in theengine-casing. The engine-casing thus forms an extension of the rearlower bars of the frame, but can beremoved from the frame by removingthe nuts from the retaining-bolts. The spring of the frame willgenerally permit the removal and replacement of the engine casing withbolts in place in the casing. The rear bars are generally held to theseat-post by a bolt 20, which permits the rear part of frame to swingback from the seat post. In solid frames there is usually sufficientelasticityin the frame-bars to permit such coupling.

The driving-pinion of the engine is inclosed by the projection 21 of thegear-casing 22. The gearcasing 22 extends alongside the hanger 14, andthe central openingin the gearcasing corresponds with that in thepedalshat't hanger. The pedal-shaft can then pass through the gear andcasing, and connection from the gear is made to the pedal-shaft ifdesirable. The casing for the reduction-gear thus becomes a link in thelongitudinal construction of the frame and adds its strength thereto.

What I claim is 1. A frame for motor-bicycles, having front post, topand bottom bars, and seat-post connected to the pedal-bracket asdescribed, the upper rear bars connected to the seat-post andwheel-forks, the lower rear bars connected to the wheel-forks and joinedby a crossbar at the front, the pedal-bracket having a perforatedupright leaf, and the engine-frame provided with bolts by which theengine is held to 'the pedal-bracket in front, and to the said cross-barin the rear, substantially as described.

2. The frame for motor-bicycles consisting essentially of the usualfront and upper parts, the seat-post and lower front bar connected tothe pedal-bracket, the engine-casing connected to the pedal-bracket atthe rear thereof, the rear lower bars connected to the engine-frame, andthe gear-casing overlapping the engine-casing and centered alongside thepedal-bracket, so that the pedal-shaft can pass through said casing andbracket, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

ROBERT M. KEATING. Witnesses:

W. A. BARTLETT, HARVEY T. WINFIELD.

